Yes, this is a true and well-documented story.
Recently, a 31-year-old New Yorker purchased liquid Sildenafil Citrate, an erectile dysfunction drug, from an online Chinese pharmacy.
After ingesting the drug, it turned his vision permanently RED!
Pfizer’s Viagra is the generic OTC version of sildenafil citrate. What the man took was not Viagra but some kind of dangerous chemical.
This case illustrates the dangers of counterfeit drugs and why you should not buy chemicals online.
Sure, you could get stuff cheaper from a Chinese internet pharmacy but is the possibility of retinal toxicity and Erythropsia (permanent red-tinted vision) worth it?
Read the original story here from Live Science